Fuse.



A. AKIN.

FUSE.

APPLICATION FILED MAY 10. 1911.

1,01 1,896, I Patented Dec. 19, 1911.

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ALLISON AKIN, OF EAST ORANGE, NEW JERSEY,

ASSIGNOR- TO WESTERN ELECTRIC COMPANY, OF NEW YORK, N. Y., A CORPORATION OF ILLINOIS.

FUSE.

Specification of Letters Patent.

Application filed May 10, 1911.

Patented Dec. 19, 1911. Serial No. 626,276.

heat conducting member constituting one To all whom it may concern:

Be it known that I, ALLISON AKIN, a cititerminal of the heat coil, to one end of zen of the United States, residing at East which is secured by fusible alloy 16 one end Orange, in the county of Essex and State of of a bowed spring 17. The other end of said New Jersey, have invented a certain new spring 17 is attached to the plate 12 and said and useful Improvement in Fuses, of which spring is normally held under compression the following is a full, clear, concise, and between said plate 12 and heat conducting exact description. terminal 15. The other terminal of the heat This invention relates to a protective decoil is attached to a terminal binding post vice for use in telephone or like circuits, 20 secured to the end of the tube 5. The end 5 which device embraces a fuse for protection of the spring 17 in contact with the plate 12 against overload currents and a heat coil arengages an opening therein and is secured rangement for protection against sneak thereto by soldering. When the heat coil currents or currents which, although not operates the fusible alloy 16 is f lsed and 15 strong enough to blow the fuse, will, if long the end of the spring 17 attached to the ter 7 continued, cause injury to the apparatus conminal member 15 thereby is released and is nected with the line. forced away therefrom and into contact with The object of this invention is to provide the inner wall of the tube 5, as indicated by an improved device of this character which the dotted lines in Fig. l of the drawings.

29 will be sure in its operation, cheap to manu- The ring 12 is secured to the tube 5 by facture andin which the various parts may punching the metal of said ring into the be easily replaced. body of said tube.

One feature of this invention relates to As shown in Fig. 4: the ring plate 12 is the arrangement of the heat coil for insurgrounded through a lightning arrester 25 25 ing a positive separation of the circuit and the fuse and heat coil are adapted to so breakingniembers of the heat coil when said open the circuit upon opposite sides of the members are disengaged. plate 12. As will be seen from this con- Other features of the invention are the struction either the fuse or the heat coil may details of construction and arrangement of be removed from the tube 5 without dis- 39 the various parts of the protector. turbing the other, it being necessary only to In the drawings Figure 1 is a longitudiloosen the end of the fuse 6 or the heat coil nal sectional view of a protector embodying spring 8 from the ring and remove the my invention; Fig. 2 is a detail perspective adjacent terminal in order to remove either of oneend of the device; Fig. 3 is a perspecof the parts. This makes possible the re- 35 tive view of a ring used in connection with placing of either the heat coil or the fuse the protector; Fig. 4 is a circuit diagram inin case one is operated and the other is not. eluding a protective device made in accord- I claim: ance with my invention. 1. In a protective device, a tube of insu- V In said drawings 5 designates a fiber or lating material provided with an opening hard rubber tube or cartridge containing a through its side wall, a metal plate secured fuse 6, a heat coil embracing a spool 7 and a o Sald t be adjacent to Said Opening, a heat spring circuit breaker 8. The fuse 6 is in- Coil in Said tube and a spring member seclosed in a sleeve 9 of noncombustible matecured to one terminal of said heat coil by rial such as asbestos and is connected at one usi le mater al, the other end of said spring end to a terminal 10 secured to one end of bearing against said metal plate.

the tube 5. At its other end said fuse ex- 2. In a protective device, a tube of insutends through an opening 11 in the side of lating material provided with an opening the tube 5 and is connected with a plate 12 through its side wall, a metal ring surround- Which in the present instance is a ring suring said tube adjacent to said opening, a

rounding and secured to said tube. The end heat coil adapted to be inserted into said of the fuse 6 connecting with the plate 12 is tube and a compressible spring having one made fast thereto by passing said end end attached to one terminal of said heat through a hole in said plate and applying a coil by fusible material, the other end of drop of solder thereto. said spring being secured to said metal ring.

Passing through the heat coil spool 7 is a 3. In a protective device, a tube formed 11C of insulating material and provided with an opening through ts side wall, metal ring surrounding a portion or" said tube and covering said opening, a line tuse connected at one end to said metal ring, a heat coil adapted to be inserted into said tube, a circuit opening member connecting one terminal of said heatcoil with said metal plate, line terminals reinovably secured to the ends of said tube and connected respectively with the outer end of said fuse and the other terminal of said heat coil.

In a protective device, a tube of insulating material provided with an opening through its side wall, a metal ring surround ing said tube adjacent to said opening, said ring being provided with openings therethrough, a line fuse located in said tube and having one end connected with said ring through one of the openings therein, a heat coil located in said tube, a spring member connected at one end to one terminal of said heat coil, the other end of said coil with said plate,

spring member being secured to said meta? ring through the other opening therein, and line terminals removably secured to the ends of said tube and connected IQSPQCtlYGlj, with the outer end of said fuse and the other terminal of said heat coil.

5. a protective device, a tube of insulating material, a metal plate secured thereto, a fuse electrically connected at one end with said plate, a heat coil in said tube, a circuit opening member normally electrically connecting one terminal of said heat and line terminals so cured to the ends of said tube and connected respectively with the outer end of said fuse and the other terminal of said heat coil.

In witness whereof, I, hereunto subscribe my name this 9th day of May, A. ll, 1911.

ELLE Old Eilll'li.

Witnesses:

IRVING MAODONALD, MORGAN WASr-rsnn1-r, J r. 

